Sentence Structure Analysis Tool

A grammar checker flags errors across your whole document at once. The sentence structure analysis tool goes deeper - it evaluates each sentence's structure, variety, and flow in context, giving sentence-level feedback on what to improve and why.

You can analyze up to 1,800 words per session. For longer documents, split them into sections and analyze each individually for the most precise, focused feedback.

Yes. The AI checks sentence variety and repetition. If your text uses the same sentence length, structure, or opening words repeatedly, it flags it under the Style category and suggests alternatives that add rhythm and interest.

Yes. It works as a sentence structure checker for essays, assignments, research papers, cover letters, and reports. Paste your text and it analyzes each sentence for run-ons, fragments, comma splices, weak transitions, and monotony, then suggests a clearer rewrite - ideal for tightening academic writing.

Yes. Run-on sentences and sentence fragments are flagged under the Structure category, with an explanation of the problem and an improved version that splits, joins, or repunctuates the sentence correctly so it reads cleanly.

Yes - you get 3 free analyses with no sign-up needed to try. After that, a free PerfectEssayWriter.ai account gives you access to this tool and 30+ others, and paid plans unlock higher limits and exports.

Any writing that needs to be clear, precise, and engaging. Academic essays, research papers, cover letters, blog posts, and professional reports all see measurable improvements from sentence-level analysis.